This writable IpAddress sets the IP subnet mask of this switch, per the description, and like cat2600TsIpAddr takes effect immediately when changed, with no separate activation step. Because the mask and the IP address (cat2600TsIpAddr) must remain consistent with each other for the management interface to keep functioning, an admin changing this value without also verifying the paired address/mask combination still describes a valid, reachable subnet risks losing remote management access to this unit immediately upon the write completing. This pairing is why these two objects are typically changed together in the same management operation rather than independently.